The engine P0186 Code is a short description but it does not helpful if real meaning of the code is not found. The real meaning of the code match with your car engine and car manufacturer. That is why, it becomes easy to solve the car engine problem. You should fix the car by professional. If you have all tools, machines, expertise and you know the meaning of the code, you can start to solve the car engine. If you do not want to fix the engine problem by yourself, you should take the car to professional. You may learn something from automobile meaning about the engine code.